Noon Onyx grew up on the banks of the river Lethe and is the daughter of a prominent politician and a descendant of Lucifer's warlords. Noon has a secret; she was born with waning magic, the dark, destructive, fiery power that is used to control demons and maintain the delicate peace among them. But a woman with waning magic is unheard of and some will consider her an abomination. Noon is summoned to attend St. Lucifer's, a school of demon law. She must decide whether to declare her powers there or attempt to continue hiding them, knowing the price for doing so may be death.